Draw-gear and buffing apparatus.



\ J. J. JONES. DRAW GEAR AND BUFPING APPARATUS.

APPLICATION FILED DBO. 9,1908.

Patented Sept. 9, 1913.

WITNESSES 720% W 7 Au'y rrnn snares JOSHUA J. JONES, OF. PITTSBURGH, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGN- MEN TS, TO UNION DRAFT GEAR COMPANY, A. CORPORATION OF ILLINOIS.

DRAW- GEAR AND BUFFING. APPARATUS.

Specification of Letters Patent.

Patented Sept..9, 1913.

Application filed December 9, 1908. Serial No. 466,602.

. Butling Apparatus, of which the following is a specification.

This invention relates to draw-gear and buffing apparatus, more particularly pf that type in which frictional resistance is em ployed for takingup and absorbing or dissipating shocks produced by draft and buffing in the movements of railway rolling stock. i

The principal object of myimprovements is to provide an improved construction of the above character which while providing a large area of friction surface is compact, simple in construction, and inexpensive to manufacture. I

In the accompanying drawing; Figure 1 is a vertical longitudinal section of a draft gear and butting apparatus embodying my improvements; and Fig. 2 a top plan view thereof, a part being shown in section.

According to a preferred construction of my invention, the draw-bar shank 1 is provided with oppositely arranged. pockets or notches in which are carried the main friction elements consisting of triangular or wedge shaped blocks 3. These friction blocks are provided with oppositely inclined friction faces 2 and 4, the blocks being so disposed that the one set of faces 4 is above the other set of faces 2, or in other words, the friction faces 2 and 4 are disposed on opposite sides of a longitudinal plane. By this means, space longitudinally is greatly economized and a large number of blocks presenting an increased amount of friction surface may. thus be employed.

The friction faces 2 coact with corresponding inclined faces of the draw bar pockets, and friction elements 5, also of triangular cross section, are provided and are adapted to bear on the opposite friction faces 4: of the. friction blocks 3.

The most forward opposite pair of the blocks 5 bear against a suitable abutment 9 secured to and between the car center sills 10, while the rearmost'opposite pair of friction blocks 3 bear against a similar ab utment 11. r

The friction elements are maintained in position laterally by plates 6, one above the top row of blocks 5 and one below the bot- PATENT onnron.

tom row of blocks 5 and one or more coil 'springs 8, mounted intermediate one ofv the plates 6 and straps 7 passing around the IlClJlOIl. mechanism, serve to resist the lat eral movement of the parts. If desired the drawubar may be constructed with openings 12 in order to reduce the weight thereof.

When a pulling strain is exerted on the draw-bar, the main friction blocks 3 are carried forward with the draw-bar and as the blocks 5 are held again forward longitudinal movement by the abutment 9, it will be apparent that the blocks 5 are forced to ride up on the friction faces 4 of the main frie tion blocks 3 against the yielding resistance of the sprin 8.

In butting, the draw-bar moves inwardly and in this case the main blocks 3 are held againstlongitudinal movement by the rear abutment. 11, so that the blocks 3 are forced laterally, producing frictional resistance on the faces 2. y

It will now be; eyident that one set of inclined faces aofth'eiblocks 3 are in action upon moveme'nt,ofthe draw-bar in one direction, while the other set of inclined faces 2 come into play upon movement of the draw-bar in the opposite direction, and that by 1placing the opposite faces of the blocks 3 a reast instead of in tandem, double the friction surface ingly increased.

Having now described my invention, what I claim as new and desire ters Patent, is

1. In a. friction draw-gear and bufiing apparatus, the combination with a draw-bar, of friction blocks having oppositely inclined friction surfaces arranged one above the other and means adapted to frictionally engage either the upper or the lower inclined surfaces of the friction blocks according to the direction of movement of, the draw-bar.

2. In a friction draw-gear and butting apparatus, the combination with a draw-bar, of friction blocks having inclined friction faces arranged on opposite sides of a longitudinal plane and means for frictionally engaging the friction faces on one side of presented is. correspondto secure by Letsaid longitudinal plane in draft movements friction faces inclined in the opposite directionfor engagingr gfthe friction faces of said friction elementsi' 1 4. In a friction draw-gear and landing apparatus, the combination with a draw-bar having inclined friction faces and friction elements having inclined friction faces, of

. friction blocks provided with friction faces inclined in one directionfor engaging the friction faces of the draw-bar and with fric tion faces inclined in the opposite direction for engaging the friction'faces of said friction elements, and yielding spring means for resisting; lateral movement of said friction blocks 'and' elements.

5. In a draftgearand bufiing mechanism, the combination with a draw-bar having notches on opposite sides provided with inclined friction faces, laterally movable friction blocks carried in said notches and having inclined friction faces adapted to engage the corresponding friction faces of the notches, friction elements bearing on said friction blocks, and yielding means for resisting lateral movement of said blocks and elements.

-the draw-bar. 1

hearing on said blocks to frictionally resist longitudinal movement of the blocks and the draw-bar in one direction, spring means for opposing the movement of said blocks, and a fixed abutment for engaging said blocks upon longitudinal movement of the draw-bar in the oppositedirection to thereby efi'ect a relative movement of the blocks upon the inclined friction surfacesand cause a lateral movement of the blocksrelative to .7. In. a friction draft gearandhuifing ap paratus, the combination wit draw-bar, of friction elementsandfriction locks having one setof frictionfac'esadaptgd to act on friction faces of the frictionelements upon longitudinal movement of the drawbar in one direction and another set offriction faces adapted to act on friction faces of the draw-bar uponlon 'itudinalmove ment of the draw-bar in the opposite direction and spring means for opposing-movement of said friction blocks.

In testimony whereof-1 I-have hereunto set my hand.

, JOSHUAJ. Jones.

Witnesses: 4

Y -B. Ro'rnnnrooim,

H. C. RICHMOND.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. (2. 

